Intermittent gearing



March 25 1930. c. H. BROWN 1,751,791

INTERMITTENT GEARING Filed May 27, 1927 2 Sheets-Sheet 1 ig i 1.

'IIIIIIIlI/IIYI/l 6'0 loiwLli Brow March 25, 1930. c. H. BROWN INTERMITTENT GEARING,

Filed May 27, 1927 2 Sheets-Sheet 2 wn awwmtoi Patented Mar. 25, 1930 UNITED STATES coLonnL'n. BROWN, on wnnnsron, 01110 INTERMITTENT GEARING- Application filed May 27, 1927. 'Serial No. 194,701.

This invention aims to provide novel means for controlling the exhaust and intake of an internal combustion engine, by means of a rotary valve, novel means being suppliedfor rotating the valve in properly timed relation to the movements of the piston.

' It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the 16 details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, maybe made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings v Figure 1 shows in vertical longitudinal section, an internalcombustion engine constructed in accordance with the invention, parts being in elevation;

Figure 2 is a top plan showing a portion of the engine block;

Figure 3 is a section taken on the line 3-3 of Figure 1; i

Figure 4 is a sectional view on the line 4-4of Figure 1;.

Figure 5 is a section on the line 5'5 of Figure1;

' Figure 6 is a section similar to Figure 5,

the valve having been removed;

Figure 7 is a sectional view showing a slight modification in the invention; and

Figures 8 and 9 are detailed views showing modifications in the gearing which drives the rotary valve. v

Referring to the form shown in Figures 1, 2, 3, 4, 5 and 6 of the drawings, there is disclosed an engine including a crank case 1 carrying a cylinder 2 provided with a lateral housing 3 having a valve chamber 4, anangular inlet port 5 and an angular exhaust port 6 communicating with the chamber 4.

A head 41 is secured at 42 to the cylinder 2, the head being provided with a recess 40. y The firing means may embody a spark plug 43 carried by the head 41. A tubular bear- I ing 7 forms part of the housing 3 and is reduced in diameter to form a seat 8. The frame work of the engine is provided with a bearing 9, located below the bearing 7 I On the crank case 1 of the engine, and within the crank case, there is a bearing ledge 10. An oil port24 is formed in thehousing 3, and communicates with the interior of the hearing 7. There is a recess 12 in the'upper end of the housing 3, the recess being of larger area than the cross section of the chamber 4.

A closure plate 14 is seated in the recess 12 and is held in place on the housing 3 by means of securing elements 15. The closure 14 has a central opening 16 which communicates with the recess .40 in the head 41.

A valve17 is journaled for rotation in the Y valve chamber 4, below the closure plate 14. In its bottom, the valve 17 has a conical recase 18, the adjacent portion of the housing being of conical form, as shown at 19, so as to cooperate with the recess 18of the valve 17'. The valve-17 has an off-set passage 20. [The upperend of the passage 20 is disposed concentrically with respect to the valve 17 and is in continuous communication with the opening 16 in the closure plate 14. The lower end of the passage 20 in the va1ve17 is arranged eccentrically with respect tothe '8 axis of rotation of the valve 17, and,'as the valve 17 rotates, the lower end of the passage .20 comes into communication with the inner ends of the ports 5 and 6, one ata time. {7 v A shaft 21 is journaled for rotation in the bearing 7 and in the bearing 9, the shaft being supplied at its upper end with an enlarged head 22 forming a shoulder 23 which turns upon the seat 8, oil being supplied to the enclosed portion of the shaft21 and its head 22, by means of the oil hole 24 formed in the housing 3, as shown in Figure 1, the oil finding its way to the hole 24 by splash or otherwise. At its upper end, the shaft 21 is secured to a reduced stem 25 on the shaft 21, by means of a nut 26, or in any other suitable way, the nut 26 being accessible through the upper end of the passage 20 in the valve 17, and through the opening 16 in the closure plate 14.

A piston 27 reciprocates in the cylinder 2 and is pivoted to a pitman 28, carried by a crank 29 on the engine shaft 30, the shaft 30 carrying a gear wheel 70 which meshes with a pinion 7 2 on a second shaft 32 journaled in the crank case 1, and corresponding'to the usual cam shaft. A third shaft 33 is disposed at right angles to the shaft 32, the

shaft 33 being journaled inthe bearing 10,

and the shaft 33 being operatively connected Onthe shaft 33 there is a holding disk 37 which is so shaped as to fit in the concavities of the star wheel 35, the disk 37 being supplied in itsperiphery with a recess 38, adapted to receivethe points or projections of the star wheel 35, when the star wheel 35 and the "shaft 21 are rotated by means of a cam arm 39 on the shaft 33, the cam arm 39 being adapted to cooperate with the projections of the star'wheel 36.

7 hen the engine shaft 30 is rotated, the gear 7 O and the pinion 72 will impart rota tionto the second shaft 32, and from the jsecondshaft 32, rotation will be imparted to the third shaft 33, by means of the beveled gears 34. When the shaft 33, is rotated, the cam arm39 on the shaft 33, cooperating with the star wheel 36 on the shaft 21, will rotate the shaft 21, step by step. The disk 37 on the shaft 33rotates in the concavities of the star wheel 35'and aids in holding the shaft 21 against rotation, saving when the shaft 21 is rotated by engagement between the cam 39 and the star wheel 36: and when the shaft 21 is rotated as aforesaid, the projections of the star wheel 35 will be received one at a time in the recess 38 which is formed in the periphery of thev disk 37. When rotation is imparted tothe shaft 21, as aforesaid, the lower end of the passage 20. in the valve 17 will come into communication with the upper ends of the inlet port 5 and the exhaust port 5, at the proper time, communication being established with the upper end of the cylinder 2, abovethe piston 27 by way of the opening 16 in the closure plate 14 and the recess 40 in the head 41.

In Figure 7 of the drawings, parts here'- inbefore described have been designated by numerals previously used, with the suffix a. The shaft 21 does not have the enlarged head 22 of Figure 1. Oil is received in the part 19 of the housing 3*, by means of an inlet port 44, the oil leaving and being returned through a port disposed near to the lowermost partof the valve chamber 4*. In the form shown in Figure 8 of the drawings, the shaft 46 corresponds to the shaft 21 of Figure 1 and is connected by beveled gears 56 to a shaft 47 corresponding to the shaft 33 but located parallel to the shaft 48, represented in Figurel by the shaft 32. The shaft cam arm 49 and the disk 50 are on the shaft 48, andthe star wheels 52 and 53 are on the shaft 47. The operation of the structure shown in Figure 8 does not differ from the structure hereinbeforeidescribed in connection with the structure depicted in Figure 1. The modifi- I cation-in Figures 8 and 9 consists, especially, in placing the shaft 47, (corresponding to the shaft 33) in parallel relation to the shaft 48, which represents the shaft 32, the'beveled gears, and the disk,and star wheels, being rearranged. j j 1 i p The gear wheel 70 has twiceas manyteeth as the pinion 72. Thus,jwhen the piston'27 makes one full stroke 0nd reaches the bottom of the cylinder2, thegear wheel 70 will have made one-half a revolution, andthe pinion 7 2 will have made a'complete revolution, and when the pinion72 makes a complete revolution, the star wheel 36,- the shaft"-21, and the-valve 17 ,willlmake one-fourth of a revolution, two complete revolutions of the gear wheel 70being'necessary' to cause one complete rotationof the valve: 17. f

As to the advantages ofthe valve'17, as a means for controlling the exhaust and the intake of an internal combustion engine, it

may be stated thata rotary-valve will lajst quite as long as any other part of the engine, the construction being suchithat the valve will'remain seated continuously, andwill so shape itself that a grinding. and reseating of the valve will be unnecessary, loss of compression' being avoided. The valve-17 .fits somewhat loosely in the parts that enclose it, and may be left with a slight superficial rough; ness, carbon being permitted to accumulate about the valve, to seal the valve asitturns in itsseat. z x a 3 Owing to the provision of the structure including the c am disk v37, the "star, wheels 3536, the arm 39, and attendant parts, the

ports 5-6 will be opened-and closedalmost instantly, at theproper time, back pressure,

and other disadvantages flowing from a slowly moving valve, beingavoided.

that is claimed is Y Y In a Geneva'wheel mechanism, shafts and mechanism for connecting the. shafts, said mechanism comprising like star wheels on one shaft, the star wheels having their sides in engagement, and-havingarcuate recesses in their edges, the recesses definingffingers in the star wheels, and'a disc and an arm on the Wheel overlying the disc, one at a time, andthe arm cooperating With the fingers of the said other star Wheel.

In testimony that I claim the foregoing as my own, I have hereto aflixed my si nature.

COLONEL H. BR WN. 

